How many types of ordinary steel plates are there, and what are the steel models?

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Weathering steel, that is, atmospheric corrosion resistant steel, is a series of low-alloy steel between ordinary steel and stainless steel, weathering steel is made of ordinary carbon steel with a small amount of copper, nickel and other corrosion-resistant elements, with the strength of high-quality steel, plastic duction, forming, welding, abrasion, high temperature, fatigue resistance, etc.

Characteristic; The weather resistance is 2 8 times that of ordinary carbon steel, and the paintability is twice that of ordinary carbon steel. At the same time, it has the characteristics of rust resistance, corrosion resistance, life extension, thinning and consumption reduction, labor saving and energy saving. Weathering steel is mainly used in steel structures that are exposed to the atmosphere for a long time, such as railways, vehicles, bridges, and towers.

It is used in the manufacture of containers, railway vehicles, oil derricks, port buildings, oil production platforms and containers containing hydrogen sulfide corrosive media in chemical and petroleum equipment.

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Steel is generally divided into four categories, profiles, plates, building materials, and pipes.

Among them, the material of profiles and plates is mainly classified as Q235B, Q345B and Q355B, while the main material of building materials is HRB400E, and the material of pipes is mainly Q235B. The types of profiles are H-beam, I-beam, channel steel, and angle steel. Among them, the plates include medium and heavy plates, pattern plates, pattern rolls, and open plates.

Classification:

According to the use, carbon steel can be divided into three categories: carbon structural steel, carbon tool steel and free-cutting structural steel. Carbon structural steel can be divided into two types: building structural steel and machine-made structural steel.

According to the carbon content, carbon steel can be divided into low carbon steel (WC), medium carbon steel (WC) and high carbon steel (WC>. According to the phosphorus and sulfur content, carbon steel can be divided into ordinary carbon steel (higher phosphorus and sulfur), high-quality carbon steel (lower phosphorus and sulfur) and high-grade high-quality steel (lower phosphorus and sulfur).

Generally, the higher the carbon content in carbon steel, the higher the hardness and higher the strength, but the plasticity is reduced.

Steel plate specifications, models, and sizes:

The thickness specifications of thin steel plate mainly include: 2mm,,,3mm.

The thickness of medium and thick steel plate mainly includes: ,,,4mm,5mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm,28mm,30mm,40mm,45mm,50mm,55mm,60mm.

Steel plates greater than 60mm are called thick steel plates, the general width of the steel plate is or, the common steel plate length is 6m or 8m, the common medium and thick steel plate width is 2m or, the common medium and thick steel plate length is 9m or 12m.

Classification of steel plate materials

1. Introduction to hot-dip galvanized steel plate is produced by continuous hot-dip galvanizing process with hot-rolled steel strip or cold-rolled steel strip as the substrate, which can prevent corrosion and rust on the surface of thin steel plate and steel strip. The one supplied with rectangular flat plate through cross-cutting is hot-dip galvanized sheet; The coiled ones are supplied in coil form as hot-dip galvanized coils.

Due to the different substrates used, hot-dip galvanized steel sheets can be divided into hot-rolled galvanized coils and cold-rolled hot-dip galvanized coils, which are mainly used in construction, home appliances, automobiles, containers, transportation and household industries. Especially in steel structure building, automobile manufacturing, steel window manufacturing and other industries.

2. Introduction to electrogalvanized steel plateElectrogalvanized products are rolled by the cold continuous rolling mill and then annealed by the CAPL unit, then enter the electrogalvanizing unit, through surface cleaning, under the action of electric field, zinc is continuously deposited from the aqueous solution of zinc salt to the surface of the pre-prepared steel strip to obtain the surface galvanized layer process.

Continuous electro-galvanized cold-rolled steel plate and steel strip are suitable for automotive, electronics, home appliances and other industries. The delivery method is mainly steel coil delivery, and the required steel plate and steel belt can also be obtained through cross-cutting or longitudinal shearing.

3. Introduction to ordinary cold-rolled sheet is a product obtained by cold pressure processing of hot-rolled sheet. Due to the multi-pass cold rolling, its surface quality is better than that of hot-rolled sheet, and after heat treatment, good mechanical properties can be obtained.

The common width and length sizes on the market are: 1000mm 2000mm, 1200mm 2400mm, 200mm 6000mm.

The commonly used sizes of steel plates with a thickness of 8mm and 12mm are: 1200mm and 6000mm.

The thin steel plate is a steel plate with a thickness of less than or equal to 4mm, the medium steel plate is a steel plate with a thickness of 4mm and 25mm, and the thick steel plate is a steel plate with a thickness greater than or equal to 25mm.

Steel plate is a flat steel made by pouring molten steel, cooling it and pressing it. The steel plate is flat, rectangular and can be rolled directly or sheared from a wide strip of steel. Steel plates are divided according to thickness, thin steel plates < 4 mm (the thinnest mm), medium steel plates 4 60 mm, extra-thick steel plates 60 115 mm.

The width of the sheet is 500 1500 mm; The width of the thickness is 600 3000 mm. Thin plates are divided according to steel types, including ordinary steel, high-quality steel, and alloy steel.

Spring steel, stainless steel, tool steel, heat-resistant steel, bearing steel.

silicon steel and industrial pure iron sheet, etc.; According to professional use, there are oil drum plates and enamels.

plates, bulletproof plates, etc.; According to the surface coating, there are galvanized sheets, tinned sheets, lead-plated sheets, plastic composite steel plates, etc.

The steel grade of thick steel plate is roughly the same as that of thin steel plate. In terms of products, in addition to bridge steel plates, boiler steel plates, automobile manufacturing steel plates, pressure vessel steel plates and multi-layer high-pressure vessel steel plates and other varieties of pure thick plates, some varieties of steel plates such as automobile girder steel plates (thick millimeters), pattern steel plates.

thickness mm), stainless steel plate, heat-resistant steel plate and other varieties are crossed with thin plates.

There are types of steel plates, such as Q175, Q215, Q235, and Q275.

1.The steel grade of thick plate is basically the same as that of thin steel plate. In terms of quality, in addition to bridge steel plates, boiler steel plates, automotive steel plates, pressure vessel steel plates, multi-layer high-pressure vessel steel plates, etc., there are also some steel plates, such as automotive steel plates (thick mm), patterned steel plates.

thickness mm), stainless steel plate, heat-resistant steel plate and other varieties are crossed with thin plates.

2.Sheet is a type of sheet manufactured by a hot-rolled or cold-rolled process with a thickness of -4 mm. The width of the sheet is 500-1400 mm. Sheets can be made of a variety of materials according to different usage requirements. Commonly used materials are ordinary carbon steel and carbon steel.

Alloy structural steel, carbon tool steel, stainless steel, spring steel.

and silicon steel for electrical use.

Widely used in automobiles, aviation, enamel.

Electrical, mechanical and other industries. In addition to thin steel sheets that are delivered directly after rolling, there are also pickling, galvanizing, tinning, etc.

3.Generally, high-strength steel plates have excellent welding properties and can be seen in all kinds of large weldments. But the trace elements contained in each steel plate.

The higher the steel plate, the higher its hardness will be, and the more carbon it will contain. Steel plates used in ship structures are referred to as ship steel plates. Due to the harsh working conditions of the hull, the hull is subjected to chemical corrosion, galvanic corrosion.

Corrosion of marine organisms and microorganisms, the hull under the action of waves and currents, changes in the strength and load of the hull, and the complexity of the ship type put forward demanding requirements for the use of steel in the hull. First of all, the most important thing is to have good toughness, in addition, it must have high corrosion resistance, welding, machinability and appearance. In order to ensure the quality of the product, to ensure its strength, it must have a chemical composition of or higher, and it must be a ship-certified factory.

The steel models are:

The types of profiles are H-beam, I-beam, channel steel, and angle steel. Among them, the plates include medium and heavy plates, pattern plates, pattern rolls, open plates, etc.

The material of profiles and plates is mainly classified as Q235B, Q345B and Q355B.

The main material of building materials is HRB400E, and the material of pipes is mainly Q235B.

Steel is a material of a certain shape, size, and properties that ingots, billets, or steel are made by pressure processing. Most steel processing is carried out by pressure processing, which causes plastic deformation of the processed steel (billets, ingots, etc.). According to the different processing temperatures of steel, it can be divided into two types: cold working and hot working.

Applications of Steel:

Medium and heavy plate refers to the thickness of the steel plate, the thickness is called the thick plate, and the thickness exceeds the extra thick plate. Uses: Medium and heavy plates are mainly used in construction engineering, machinery manufacturing, container manufacturing, shipbuilding, bridge construction, etc.

It can also be used to manufacture various containers, furnace shells, furnace plates, bridges and automobile static steel plates, low-alloy steel plates, general steel plates, boiler steel plates, pressure vessel steel plates, pattern steel plates, automobile girder steel plates, tractor parts and welded components. For medium and heavy plate practitioners, there is more storage of China Iron and Steel Spot Network, which is a unified platform for querying steel spot resources across the country.

Specific applications: Steel plates for bridges: used for large railway bridges. It is required to withstand dynamic load, impact, vibration, corrosion resistance, etc., such as: Q235Q, Q345Q, etc.

Shipbuilding steel plate: used in the manufacture of marine and inland ship hulls. It requires high strength, plasticity, toughness, cold bending performance, welding performance, and corrosion resistance. Such as: A32, D32, A36, D36, etc.

The spec sheet is as follows:

1. Classification of steel plates (including strip steel):

1. Classification according to thickness: (1) thin plate (2) medium plate (3) thick plate (4) extra-thick plate.

2. Classification according to production methods: (1) hot-rolled steel plate (2) cold-rolled steel plate.

3. Classification according to surface characteristics: (1) galvanized sheet.

Hot-dip galvanized sheet, electro-galvanized sheet) (2) tin plate, (3) composite steel sheet, (4) color coated steel sheet.

4. Classification by use: (1) bridge steel plate (2) boiler steel plate (3) shipbuilding steel plate (4) armor steel plate (5) automobile steel plate (6) roofing steel plate (7) structural steel plate (8) electrical steel plate (silicon steel sheet.

9) Spring steel plate (10) Others.

Steel plate is a commonly used building material product in our construction industry, among which high-strength steel plate is often used in power station equipment, mining machinery and bridges and other buildings with high-quality performance and comprehensive force. However, many people don't know much about high-strength steel plates, so what are the models of high-strength steel plates? How to choose steel?

What are the models of high-strength steel plates:

High-strength steel plates are divided into Q390, Q420, Q460, Q550, and Q690 models, which have the characteristics of high strength and strong welding performance, so they are often used in various large weldments. However, the microalloying elements contained in different types of steel plates are different, and the higher the microalloy content, the greater the strength of the steel, and thus the carbon content in the steel will also increase.

How to choose steel?

1. First of all, when buying steel, it is necessary to see whether the steel is folded, that is, there are many folds on the longitudinal surface of the steel, and these folds are mainly due to the fact that the manufacturer in order to pursue efficiency, the amount of pressure is too large to produce ears, so that it will be formed when rolling in the next process, and this steel is easy to crack and break in use.

2. Secondly, when purchasing steel, it is necessary to see whether there is a hemp surface on the surface of the steel, if there is, it means that the steel is of inferior quality, because the manufacturer uses excessive rolling groove rolling in order to reduce costs. In addition, if there is scarring on the surface of the steel, it is not recommended to buy it, mainly because the steel material content is not pure, or the manufacturer's production equipment is inferior, and it is easy to stick to the steel, which causes the scarring phenomenon after the roll.

3. Finally, when purchasing steel, we should also pay attention to the cracks on the surface of the steel, and the reasons for the formation of cracks are mostly due to the use of porous adobe in the manufacture of the manufacturer, coupled with the effect of thermal expansion and cold contraction, so that the rolled steel has a large leakage crack.

Summary: The above is the introduction of high-strength steel plate models and how to buy steel related content, I hope to help friends in need, if you need to know more about related knowledge in the later stage, welcome to pay attention to Qeeka Home.